Nuku'alofa, An earthquake measuring 4.5 magnitude on the Richter scale hit Tonga on Tuesday. The US Geological Survey (USGS) said that the epicenter of the earthquake occurred 111 km Hihifo area, at a depth of 257.1 km. There have been no reports about human losses or material damage as a result of the earthquake so far. Tonga is an archipelago of 176 scattered islands in the South Pacific Ocean, of which only 52 are inhabited. Source: Qatar News Agency